Oh Dave, your understanding is not like God's understanding at all.
When God took Israel out of Egypt, Israel badly needed redemption and salvation. Moses spent 40 years in the desert with his father in-law to learn from Ruel, which means friend of God, about the things of God. Jethro was a descendant of Abraham's through Keturah, his third wife. Just before Abraham died he sent them away from Isaac towards the east, with one family going down to the Sinai Desert to wait for an Israelite who would come out of Egypt. Jethro passed on to Moses all that he had been taught about the things of God which had been passed onto him by his fathers. Moses was brought into Jethro's house around 505 years after Abraham had died. Jethro live a simple life in the desert in communion with God. He was a priest and a teacher. Moses was his student.
The Ten Commandments were a part of the Salvation Covenant which was embedded into the Kingdom of Priest, a Holy Nation and His Possession among the Nations Covenant with the nation of Israel and within this covenant we are also told about the reason for Israel being scattered to the four points of the compass throughout all of the earth in the second commandment of the ten. Because the Ten Commandments existed before God's covenant with the Nation of Israel, the Ten Commandments is applicable to all the inhabitants of the earth, not just Israel. Jacob certainly knew that there should be no idols within his household and so when he returned to the Land of Canaan to be with his father Isaac, Jacob took all of the idols that were at that time held by the members of his household and buried them all under a tree when he entered into the land of Canaan. Jacob did this because he was aware of the relational commandments that are embedded within the Ten Commandment.
God intends when he gathers the nation of Israel to himself once more to make like new His covenant of a Kingdom of Priests, a Holy Nation and His Possession among the nations once more with all that is Israel. This gathering will occur around the time of Armageddon. Some 4,000 plus years after the birth of Isaac.
Shalom